Prot-On allows you to encrypt and control your files (photos, videos, audios, documents, text...etc) that you share, and to decide, and track, who and when can access them. You can view / play protected files directly on your mobile and keep control of any existing copies wherever they might be (in the cloud, in other phones, computers or storage devices). If you regret having sent a file you can take away access in an instant. It's free and very easy to use, you just have to download the appl